Boechera howellii
(S. Watson) Windham & Al-Shehbaz
Identity
Unique IDELEMENT_GLOBAL.2.1231066
Element CodePDBRA40360
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicendemic to a single nation
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderCapparales
FamilyBrassicaceae
GenusBoechera
Concept ReferenceFlora of North America Editorial Committee (FNA). 2010. Flora of North America north of Mexico. Vol. 7. Magnoliophyta: Salicaceae to Brassicaceae. Oxford University Press, New York. xxii + 797 pp.
Taxonomic CommentsBoechera howellii is described as a species, distinct from B. platysperma as opposed to a variety of it, by Windham and Al-Shehbaz (2006). The treatment of B. howellii in FNA (2010, vol. 7) also excludes B. covillei (described by Windham and Al-Shehbaz 2007b) as a distinct species. Thus, B. howellii sensu FNA is narrower than A. platysperma var. howellii as treated by Rollins (1993) and accepted by Kartesz (1994 and 1999).
According to Windham and Al-Shehbaz (2007b), "Pollen from the lectotype (and many other specimens) of B. howellii indicate that this taxon is a sexual diploid, whereas all flowering collections of B. covillei examined had pollen characteristic of apomictic triploids. This discrepancy in ploidy level and reproductive mode is accompanied by several morphological differences. Boechera covillei is distinguished from B. howellii by having basal leaf margins with 2- or 3(or 4)-rayed (vs. simple or rarely 2-rayed) trichomes, a greater number of ovules per ovary (18–30 vs. 10–20), and narrower (1.0–1.5 vs. 1.3–2.5 mm) seed wings."
Other Nations (1)
United StatesNNR
| Province | Rank | Native |
|---|
| Nevada | SNR | Yes |
| Oregon | SNR | Yes |
| California | SNR | Yes |
References (4)
- Flora of North America Editorial Committee (FNA). 2010. Flora of North America north of Mexico. Vol. 7. Magnoliophyta: Salicaceae to Brassicaceae. Oxford University Press, New York. xxii + 797 pp.
- Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
- Kartesz, J.T. 1999. A synonymized checklist and atlas with biological attributes for the vascular flora of the United States, Canada, and Greenland. First edition. In: Kartesz, J.T., and C.A. Meacham. Synthesis of the North American Flora, Version 1.0. North Carolina Botanical Garden, Chapel Hill, N.C.
- Windham, M.D., and I.A. Al-Shehbaz. 2007b. New and noteworthy species of <i>Boechera</i> (Brassicaceae) III: Additional sexual diploids and apomictic hybrids. Harvard Papers in Botany 12(1): 235-257.